Ngb
abbr. negative guard board 底片档板，阴极档板
🗣️ 情景例句
I'm sorry, but I've got to be on my way.
很抱歉，我必须走了。
The percentage of the pay raise equals the increase in prices.
薪水的提高比率和物价的上升一致。
Ask Mr. Wu if you can have some old boxes.
问问吴先生，你能否搞到一些旧箱子。